June 18, 2024 KLONG CPS Design Meeting

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Meeting Time and Place

Tuesday, June 18, 2024, 1:00pm Hall D Counting House

  • Invited - Hovanes Egiyan, Stephanie Worthington, Keith Harding, Pavel Degtiarenko, Tim Whitlatch, Eugene Chudakov, Josh Ballard

Agenda

  • Review minutes from last meeting https://halldweb.jlab.org/wiki/index.php/June_04,_2024_KLONG_CPS_Design_Meeting
  • Review new basic 3D model
    • Core Section update
    • New radiation levels? Pavel
    • Copper replaced CuW inside and adjacent to magnet coils
    • Layout of magnet and components (Stephanie/Keith)
    • Demo of AeroGo system successful
      • Noise low (less than 70 db in hall, 85db in ramp near compressor)
      • No visible dust
  • Carbon ring upstream of CPS
  • Power supply status - On order, due March 2025
  • Met with Survey and Alignment group and agreed on preliminary plan for alignment - will meet again as details develop
  • Magnet update (Josh/Stephanie)
    • Radiation levels at coils 2.E+4 Gy for a 10000 hour run
    • Plan on using copper dump skid to cool magnet - is it adequate LCW?
  • Copper cooling update -
  • Lead brick painting is 10% done and all due back in September
  • DeGauss test summer 2024
  • June - items due from ERR
    • Thermal cycling of tungsten and copper write up - in work - justifying annealed copper (Tim)
    • Working on ANSYS plastic analysis and FLUENT models

Minutes

  • Reviewed minutes from last meeting
  • Pavel has run the radiation and energy absorption (Fluka) for the latest absorber and shielding configuration
    • Hovanes put Pavels finer mesh models into csv files
    • Keith changed 3D model geometry to match Pavel's latest
      • Copper substituted for CuW in and around magnet
    • Radiation levels at magnet coils are 4e4 gray for 10000 hrs running
      • No need for expensive epoxy ($5K per gallon)
      • CTD-101K resin can be used - good for 4e6 gray minimum
      • Need to check on LCW quality of existing dump copper cooling skid for magnet compatibility (Tim)
    • Pavel's new geometry has tapered steel upstream of absorber in X and Y - needs
    • Also taper in Y in Cu/W in magnet area - adjusted to use the exit size all the way through
    • New files with fine granularity in absorber high energy absorption areas are available - Hovanes converted to usable files for ANSYS
    • Tim will run new ANSYS models for the complete assembly
    • Tim learning FLUENT to verify cooling assumptions
    • There needs to be a collimator upstream of radiator
      • 1cm diameter hole
      • 15 cm deep in Z
      • OD of ? cm
      • About 10W absorption - no active cooling required
      • 80% W, 20% Cu
  • Looking at 3D model
    • Core assembly coming together
      • Met with Alignment group Thursday to discus alignment/fiducialization plan
      • Looked at "Noah's Arc" stacking of steel - need features for stacking lead and heavy concrete
      • Copper absorber vacuum brazing test piece has been machined - will get tubing ready to braze in coming week
    • Air casters for moving - AeroGo demonstration proved to be successful
      • 5400 lbs moved with 25 lbs of force
  • Discussion on FSD device to shut down beam if mis-steered - Hovanes has ideas and Pavel will look at feasability considering background
  • Lead brick painting awarded - 17% complete
  • Magnet Power Supply on schedule to be delivered March 2025
  • Magnet DeGauss test still scheduled for summer - Tim will check on any progress
  • Tim still writing and analyzing copper and tungsten thermal cyling data for ERR reply to Patrizia - hopefully a draft next week
  • Need to link engineering documentation to the KLONG CPS wiki when available - only final documents
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